package com.example.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet Filter implementation class CharSetFilter
 */
@WebFilter("/*")
public class MyFilter implements Filter {

    /**
     * Default constructor.
     */
    public MyFilter() {
        // TODO Auto-generated constructor stub
    }

    /**
     * @see Filter#destroy()
     */
    public void destroy() {
        // TODO Auto-generated method stub
    }

    /**
     * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
     */
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // TODO Auto-generated method stub
        // place your code here

        // pass the request along the com.example.filter chain
        HttpServletRequest req=(HttpServletRequest)request;
        HttpServletResponse rep=(HttpServletResponse)response;
        req.setCharacterEncoding("utf-8");//对请求信息进行编�?
        rep.setCharacterEncoding("utf-8");//对响应信息进行编码，同时修改html编码
        rep.setContentType("text/html;charset=utf-8");
        ((HttpServletResponse)response).addHeader("Access-Control-Allow-Origin","*");//以下三行解决跨域问题�?47-49�?
        ((HttpServletResponse)response).addHeader("Access-Control-Allow-Headers",
                "Origin, X-Requested-With, Content-Type, Accept");
        //System.out.println("...........");
        chain.doFilter(request, response);
    }

    /**
     * @see Filter#init(FilterConfig)
     */
    public void init(FilterConfig fConfig) throws ServletException {
        // TODO Auto-generated method stub
    }

}
